Datasheet > RT3668EB

RT3668EB

更新时间： 2024-11-07 15:50:03

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
30页	1954K
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RT3668EB 技术参数

Status：	Active	VID Table Support：	SVI2
Number of Phases：	2	Vcc (typ) (V)：	5
Vin (min) (V)：	4.5	Vin (max) (V)：	26
Accuracy (Vout>=1V) (+/- %)：	0.5	Freq (typ) (kHz)：	400
Built-in DAC Generator：	Yes	Number of MOSFET Drivers：	2
Features：	Diode Emulation Mode;Fast Transient Response;G-NAVP Control;OCP;OVP;Power Good;UVP	Package Type：	WQFN5x5-40

RT3668EB 数据手册

RT3668EB

Single Channel PWM Controller with 2 Integrated Drivers and

1 LDO Regulator for AMD SVI2 GFX and FCH Power Supply

General Description

Features

 2/1-Phase (VDDCR_GFX) PWM Controller

 2 Embedded MOSFET Driver

 1 LDO Regulator for FCH

The RT3668EB is a single channel PWM controller with

2 integrated drivers and 1 LDO regulator, it is compliant

with AMD SVI2 Voltage Regulator Specification to

support FP4 GFX power (VDDCR_GFX) and FCH

power (VDDCR_FCH_S5). The RT3668EB features

CCRCOT (Constant Current Ripple Constant On-Time)

with G-NAVP (Green-Native AVP), which is Richtek's

proprietary topology. G-NAVP makes it an easy setting

controller to meet all AMD AVP (Adaptive Voltage

Positioning) GFX requirements. The droop is easily

programmed by setting the DC gain of the error

amplifier. With proper compensation, the load transient

response can achieve optimized AVP performance. The

controller also uses the interface to issue VOTF

Complete and to send digitally encoded voltage and

current values for the GFX domains. The RT3668EB

can operate in diode emulation mode to enhance the

light load efficiency. And it provides the current gain

adjustment capability by pin setting. The RT3668EB

also provides power good indication, thermal indication

(VRHOT_L), and it features complete fault protection

functions including over current, over voltage, under

voltage.

 G-NAVPTM Topology

 Support Dynamic Load-Line and Zero Load-Line

 Diode Emulation Mode at Light Load Condition

 SVI2 Interface to Comply with AMD Power

Management Protocol

 Adjustable Current Gain Capability

 DVID Enhancement

 0.5% DAC Accuracy

 Differential Remote Voltage Sensing

 Build-in ADC for Pin Setting Programming,

Thermal Indication and VOUT, IOUT Reporting

 Fast Transient Response

 Power Good Indicator

 Thermal Indicator (VRHOT_L)

 OVP, UVP and UVLO

 Over Current Protection

Applications

 AMD FP4 GFX and FCH Power

Simplified Application Circuit

RT3668EB

VRHOT_L

PHASE1

MOSFET

VDDCR_GFX

PHASE2

LDO_IN

SVC

To GFX

IN_LDO

SVD

SVT

LDO_OUT

OUT_LDO

MUX_CTRL

VSEN_NB_IN S5_OUT

VDDNB

VDDCR_FCH_S5

is a registered trademark of Richtek Technology Corporation.

DS3668EB-05 August 2019

www.richtek.com

12 3 4 5 6 7...30

中文翻译

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